Wash and peel the white asparagus and cut off the woody ends. Wash the green asparagus, peel the lower third and cut off the woody ends. For the pancakes, beat the eggs, salt and pepper until foamy.
Mix flour and baking powder, sieve onto the egg mixture and stir in. Stir in milk and mineral water. Let the dough swell for about 20 minutes. In the meantime, cook white asparagus in boiling salted water with 1 pinch of sugar at low heat for about 16 minutes.
Add the green asparagus after about 4 minutes of cooking time. Peel and finely dice the onion. Wash, clean, quarter, seed and dice the tomatoes. Mix vinegar, salt, pepper, sugar, onions and tomatoes.
Add oil. Wash parsley, dab dry and chop finely. Wash chives, dab dry and cut into fine rolls. Stir the herbs into the pancake batter. Heat the clarified butter in portions in a pan.
Bake 8 golden yellow pancakes one after the other. Lift the asparagus out of the water and let it drain. Fill the pancakes with asparagus, pour some vinaigrette over the asparagus and serve with pepper and chervil garnish as you like.